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  #1  
Old 12-14-2003, 10:30 PM
marco100 marco100 is offline
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94 marquis problems

my marquis has some big problems, and i really need help cause everybody i have taken it to has no idea what is wrong, hope you can help. it backfires, and jerks back and forth, on acceleration but it also does it whenever you drive down the road, really bad when pulling the hill.
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Old 12-16-2003, 06:11 PM
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MercCougarXR7 MercCougarXR7 is offline
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What's been maintained recently, what hasn't been?


Plugs, wires,
PVC valve,
fuel, oil, and air filters,

Pluged catalytics?
Bad batch of fuel?
Vacuum hose fell off?
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Old 01-06-2004, 03:24 PM
bon3 bon3 is offline
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Re: 94 marquis problems

check spark plug wires, the set up could be wrong. Make sure the wiring is correct.
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